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Stroke ischemia reperfusion

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https://www.readbyqxmd.com/read/28547077/effects-of-the-combined-treatment-of-bone-marrow-stromal-cells-with-mild-exercise-and-thyroid-hormone-on-brain-damage-and-apoptosis-in-a-mouse-focal-cerebral-ischemia-model
#1
Kobar Akhoundzadeh, Abedin Vakili, Hamid Reza Sameni, Abbas Ali Vafaei, Ali Rashidy-Pour, Manouchehr Safari, Razieh Mohammadkhani
This study examined whether post-stroke bone marrow stromal cells (BMSCs) therapy combined with exercise (EX) and/or thyroid hormone (TH) could reduce brain damage in an experimental ischemic stroke in mice. Focal cerebral ischemia was induced under Laser Doppler Flowmetry (LDF) guide by 45 min of middle cerebral artery occlusion (MCAO), followed by 7 days of reperfusion in albino mice. BMSCs were injected into the right cerebral ventricle 24 h after MCAO, followed by daily injection of T3 (20 μg/100 g weight S...
May 25, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28545277/-effect-of-the-ischemic-post-conditioning-on-the-prevention-of-the-cardio-renal-damage-in-patients-with-acute-st-segment-elevation-myocardial-infarction-after-primary-percutaneous-coronary-intervention
#2
Y Y Wang, T Li, Y W Liu, B J Liu, X M Hu, Y Wang, W Q Gao, P Wu, L Huang, X Li, W J Peng, M Ning
Objective: To evaluate the effect of the ischemic post-conditioning (IPC) on the prevention of the cardio-renal damage in patients with acute ST-segment elevation myocardial infarction (STEMI) after primary percutaneous coronary intervention (PPCI). Methods: A total of 251 consecutive STEMI patients underwent PPCI in the heart center of Tianjin Third Central Hospital from January 2012 to June 2014 were enrolled in this prospective, randomized, control, single-blinded, clinical registry study. Patients were randomly divided into IPC group (123 cases) and control group (128 cases) with random number table...
April 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28539998/correlation-between-cannabidiol-induced-reduction-of-infarct-volume-and-inflammatory-factors-expression-in-ischemic-stroke-model
#3
Sepideh Khaksar, Mohammad Reza Bigdeli
INTRODUCTION: Recent studies demonstrated that cannabidiol had neuroprotective property. There is some evidence about effective role of cannabidiol in reduction of ischemic damages. It has been reported that infarct size is influenced by various factors after MCAO, including inflammatory factors. The aim of the present study was to evaluate the effect of cannabidiol on infarction volume and correlation of infarct size with tumor necrosis factor receptor 1 (TNFR1), and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) expression...
March 2017: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/28539818/isoflurane-preconditioning-inhibits-the-effects-of-tissue-type-plasminogen-activator-on-brain-endothelial-cell-in-an-in-vitro-model-of-ischemic-stroke
#4
So Yeong Cheon, So Yeon Kim, Eun Hee Kam, Jae Hoon Lee, Jeong Min Kim, Eun Jung Kim, Tae Whan Kim, Bon-Nyeo Koo
Tissue-type plasminogen activator (tPA) is the only treatment for ischemic stroke. However, tPA could induce the intracranial hemorrhage (ICH), which is the main cause of death in ischemic stroke patient after tPA treatment. At present, there is no treatment strategy to ameliorate tPA-induced brain injury after ischemia. Therefore, we investigated the effect of pre-treated isoflurane, which is a volatile anesthetic and has beneficial effects on neurological dysfunction, brain edema and infarct volume in ischemic stroke model...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28526762/exacerbation-of-thromboinflammation-by-hyperglycemia-precipitates-cerebral-infarct-growth-and-hemorrhagic-transformation
#5
Jean-Philippe Desilles, Varouna Syvannarath, Véronique Ollivier, Clément Journé, Sandrine Delbosc, Célina Ducroux, William Boisseau, Liliane Louedec, Lucas Di Meglio, Stéphane Loyau, Martine Jandrot-Perrus, Louis Potier, Jean-Baptiste Michel, Mikael Mazighi, Benoit Ho-Tin-Noé
BACKGROUND AND PURPOSE: Admission hyperglycemia is associated with a poor outcome in acute ischemic stroke. How hyperglycemia impacts the pathophysiology of acute ischemic stroke remains largely unknown. We investigated how preexisting hyperglycemia increases ischemia/reperfusion cerebral injury. METHODS: Normoglycemic and streptozotocin-treated hyperglycemic rats were subjected to transient middle cerebral artery occlusion. Infarct growth and brain perfusion were assessed by magnetic resonance imaging...
May 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28518065/transient-middle-cerebral-artery-occlusion-model-of-neonatal-stroke-in-p10-rats
#6
Amara Larpthaveesarp, Fernando F Gonzalez
A number of animal models have been used to study hypoxic-ischemic injury, traumatic injury, global hypoxia, or permanent ischemia in both the immature and mature brain. Stroke occurs commonly in the perinatal period in humans, and transient ischemia-reperfusion is the most common form of stroke in neonates. The reperfusion phase is a critical component of injury progression, which occurs over a period of days to weeks, and of the endogenous response to injury. This postnatal day 10 (p10) rat model of transient middle cerebral artery occlusion (tMCAO) creates a unilateral, non-hemorrhagic focal ischemia-reperfusion injury that can be utilized to study the mechanisms of focal injury and repair in the full-term-equivalent brain...
April 21, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28507312/design-and-evaluation-of-ephrina1-mutants-with-cerebral-protective-effect
#7
Yuanjun Zhu, Yuanqing Gao, Danping Zheng, Mengyang Shui, Kuai Yu, Xiaoyan Liu, Yuan Lin, Li Su, Wenxing Yang, Yinye Wang
The activation of EphA2 receptor by its natural ligand EphrinA1 causes blood brain barrier dysfunction, and inactivation of EphA2 reduces BBB damage in ischemic stroke. Thus, EphA2 targeted antagonists may serve as neuroprotective agents. We engineered four mutants of EphrinA1, EM1, EM2, EM3 and EM4, respectively. The computational analysis showed that these four mutants were capable of interacting with EphA2. Their potential neuroprotective effects were examined in mouse focal ischemia/reperfusion (I/R) model...
May 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28501505/sevoflurane-postconditioning-attenuates-reactive-astrogliosis-and-glial-scar-formation-after-ischemia-reperfusion-brain-injury
#8
Yong-Ming Zhu, Xue Gao, Yong Ni, Wei Li, Thomas A Kent, Shi-Gang Qiao, Chen Wang, Xiao-Xuan Xu, Hui-Ling Zhang
Cerebral ischemia leads to astrocyte's activation and glial scar formation. Glial scar can inhibit axonal regeneration during the recovery phase. It has demonstrated that sevoflurane has neuroprotective effects against ischemic stroke, but its effects on ischemia-induced formation of astrogliosis and glial scar are unknown. This study was designed to investigate the effect of sevoflurane postconditioning on astrogliosis and glial scar formation in ischemic stroke model both in vivo and in vitro. The results showed that 2...
May 10, 2017: Neuroscience
https://www.readbyqxmd.com/read/28479229/molecular-mechanisms-mediating-the-neuroprotective-role-of-the-selective-estrogen-receptor-modulator-bazedoxifene-in-acute-ischemic-stroke-a-comparative-study-with-17%C3%AE-estradiol
#9
Teresa Jover-Mengual, María Castelló-Ruiz, María C Burguete, María Jorques, Mikahela A López-Morales, Alicia Aliena-Valero, Andrés Jurado-Rodríguez, Salvador Pérez, José M Centeno, Francisco J Miranda, Enrique Alborch, Germán Torregrosa, Juan B Salom
As the knowledge on the estrogenic system in the brain grows, the possibilities to modulate it in order to afford further neuroprotection in brain damaging disorders so do it. We have previously demonstrated the ability of the selective estrogen receptor modulator, bazedoxifene (BZA), to reduce experimental ischemic brain damage. The present study has been designed to gain insight into the molecular mechanisms involved in such a neuroprotective action by investigating: 1) stroke-induced apoptotic cell death; 2) expression of estrogen receptors (ER) ERα, ERβ and the G-protein coupled estrogen receptor (GPER); and 3) modulation of MAPK/ERK1/2 and PI3K/Akt signaling pathways...
May 4, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28469657/fermented-chinese-formula-shuan-tong-ling-attenuates-ischemic-stroke-by-inhibiting-inflammation-and-apoptosis
#10
Zhi-Gang Mei, Ling-Jing Tan, Jin-Feng Wang, Xiao-Li Li, Wei-Feng Huang, Hua-Jun Zhou
The fermented Chinese formula Shuan-Tong-Ling is composed of radix puerariae (Gegen), salvia miltiorrhiza (Danshen), radix curcuma (Jianghuang), hawthorn (Shanzha), salvia chinensis (Shijianchuan), sinapis alba (Baijiezi), astragalus (Huangqi), panax japonicas (Zhujieshen), atractylodes macrocephala koidz (Baizhu), radix paeoniae alba (Baishao), bupleurum (Chaihu), chrysanthemum (Juhua), rhizoma cyperi (Xiangfu) and gastrodin (Tianma), whose aqueous extract was fermented with lactobacillus, bacillus aceticus and saccharomycetes...
March 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28467977/treatment-with-enriched-environment-reduces-neuronal-apoptosis-in-the-periinfarct-cortex-after-cerebral-ischemia-reperfusion-injury
#11
Xiuping Chen, Xin Zhang, Li Xue, Chizi Hao, Weijing Liao, Qi Wan
BACKGROUND/AIMS: Enriched environment (EE) has been reported to exert neuroprotective effect in animal models of ischemic stroke. However, the underlying mechanism remains unclear. The purpose of this study was to investigate the effect of EE treatment on neuronal apoptosis in the periinfarct cortex after cerebral ischemia/reperfusion (I/R) injury. METHODS: The cerebral I/R injury was established by middle cerebral artery occlusion (MCAO). A set of behavioral tests including the modified neurological severity score (mNSS), limb-placing test and foot-fault test were conducted...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28465087/supplementation-with-different-teas-from-camellia-sinensis-prevents-memory-deficits-and-hippocampus-oxidative-stress-in-ischemia-reperfusion
#12
Alexandre Martins, Helen L Schimidt, Alexandre Garcia, Caroline Dalla Colletta Altermann, Francielli W Santos, Felipe P Carpes, Weber Cláudio da Silva, Pâmela B Mello-Carpes
Memory and cognition impairments resultant of ischemic stroke could be minimized or avoided by antioxidant supplementation. In this regard, the neuroprotective potential of Green tea from Camellia sinensis has been investigated. However, there is a lack of information regarding the neuroprotective potential of others teas processed from the Camellia sinensis. Here we investigate the neuroprotective role of green, red, white and black tea on memory deficits and brain oxidative stress in a model of ischemic stroke in rats...
April 29, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28446953/neuroprotective-effects-of-exercise-on-brain-edema-and-neurological-movement-disorders-following-the-cerebral-ischemia-and-reperfusion-in-rats
#13
Nabi Shamsaei, Soheila Erfani, Masoud Fereidoni, Ali Shahbazi
INTRODUCTION: Cerebral ischemia and reperfusion causes physiological and biochemical changes in the neuronal cells that will eventually lead to cell damage. Evidence indicates that exercise reduces the ischemia and reperfusion-induced brain damages in animal models of stroke. In the present study, the effect of exercise preconditioning on brain edema and neurological movement disorders following the cerebral ischemia and reperfusion in rats was investigated. METHODS: Twenty-one adult male wistar rats (weighing 260-300 g) were randomly divided into three groups: sham operated, exercise plus ischemia, and ischemia group (7 rats per group)...
January 2017: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/28439774/albumin-induced-neuroprotection-in-focal-cerebral-ischemia-in-the-alias-trial-does-severity-mechanism-and-time-of-infusion-matter
#14
Rakesh Khatri, Mohammad Rauf Afzal, Gustavo J Rodriguez, Alberto Maud, Muhammad Shah Miran, Mohtashim Arbaab Qureshi, Salvador Cruz-Flores, Adnan I Qureshi
OBJECTIVE: To determine whether there is any differential benefit of albumin administration within 2 h of onset of ischemia and in settings (severe ischemia with reperfusion in cardioembolic strokes with National Institutes of Health Stroke Scale [NIHSS] ≥15), most representative of experimental models of cerebral ischemia in which albumin was effective in reducing neurological injury. BACKGROUND: High-dose intravenous (IV) albumin treatment for acute ischemic stroke (ALIAS) trial did not show overall clinical benefit in ischemic stroke patients in contrast to preclinical studies; however, models of preclinical studies were not completely followed...
April 24, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28436705/pharmacologically-increasing-collateral-perfusion-during-acute-stroke-using-a-carboxyhemoglobin-gas-transfer-agent-sanguinate%C3%A2-in-spontaneously-hypertensive-rats
#15
Marilyn J Cipolla, Italo Linfante, Abe Abuchowski, Ronald Jubin, Siu-Lung Chan
Similar to patients with chronic hypertension, spontaneously hypertensive rats (SHR) develop fast core progression during middle cerebral artery occlusion (MCAO) resulting in large final infarct volumes. We investigated the effect of Sanguinate™ (SG), a PEGylated carboxyhemoglobin (COHb) gas transfer agent, on changes in collateral and reperfusion cerebral blood flow and brain injury in SHR during 2 h of MCAO. SG (8 mL/kg) or vehicle ( n = 6-8/group) was infused i.v. after 30 or 90 min of ischemia with 2 h reperfusion...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28434994/transient-upregulation-of-nav1-6-expression-in-the-genu-of-corpus-callosum-following-middle-cerebral-artery-occlusion-in-the-rats
#16
Hongyan Zhu, Weide Lin, Yuxiao Zhao, Ziyi Wang, Wenwen Lao, Ping Kuang, Houguang Zhou
Focal ischemic stroke can lead to brain damage and cause human disability and death. Increased excitatory transmission and reduced neuronal inhibition are important pathological alterations in the cerebral ischemia, which can induce abnormal brain excitability. Nav1.6 is a key determinant of neuronal excitability in the nervous system. Here we investigate the expression of Nav1.6 at protein and mRNA levels in the rats subjected to middle cerebral artery occlusion (MCAO). Nav1.6 expression at mRNA levels in the ischemic and contralateral hemispheres of MCAO rats were persistently decreased at 6h, 12h and 24h after reperfusion compared to the sham-operated rats...
April 20, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28433650/long-noncoding-rna-malat1-is-a-potent-autophagy-inducer-protecting-brain-microvascular-endothelial-cells-against-oxygen-glucose-deprivation-reoxygenation-induced-injury-by-sponging-mir-26b-and-upregulating-ulk2-expression
#17
Zhijun Li, Jing Li, Na Tang
Brain microvascular endothelial cell (BMEC) injury induced by ischemia-reperfusion (I/R) is the initial stage of blood-brain barrier (BBB) disruption, which results in a poor prognosis in ischemic stroke patients. Autophagy has been shown to have protective effects on BMECs against cerebral ischemic insults. However, molecular mechanism of BMEC autophagy during I/R is unclear. Long noncoding RNAs (lncRNAs) are emerging as new factors involved in cell autophagy. LncRNA Malat1 is one of the most highly upregulated I/R or OGD/R-responsive endothelial lncRNA and plays a protective role in BMECs against cerebral ischemic insults...
April 20, 2017: Neuroscience
https://www.readbyqxmd.com/read/28428752/desensitizing-mitochondrial-permeability-transition-by-erk-cyclophilin-d-axis-contributes-to-the-neuroprotective-effect-of-gallic-acid-against-cerebral-ischemia-reperfusion-injury
#18
Jing Sun, Da-Dui Ren, Jin-Yi Wan, Chen Chen, Dong Chen, Huan Yang, Chun-Lai Feng, Jing Gao
Ischemic stroke is a devastating disease with complex pathophysiology. Much evidence confirms that opening of the mitochondrial permeability transition pore (MPTP) is related with mitochondrial dysfunction to apoptosis in ischemic stroke, thus elucidating its signaling mechanism and screening novel MPTP inhibitor is therefore of paramount importance. Our earlier studies identified that gallic acid (GA), a naturally occurring plant phenol, endows with effect on inhibition of mitochondrial dysfunction, which has significant neuroprotective effect in cerebral ischemia/reperfusion injury...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28428349/toll-like-receptor-4-mediates-hemorrhagic-transformation-after-delayed-tissue-plasminogen-activator-administration-in-in-situ-thromboembolic-stroke
#19
Alicia García-Culebras, Sara Palma-Tortosa, Ana Moraga, Isaac García-Yébenes, Violeta Durán-Laforet, Maria I Cuartero, Juan de la Parra, Ana L Barrios-Muñoz, Jaime Díaz-Guzmán, Jesús M Pradillo, María A Moro, Ignacio Lizasoain
BACKGROUND AND PURPOSE: Hemorrhagic transformation is the main complication of revascularization therapies after stroke. Toll-like receptor 4 (TLR4) is implicated in cerebral damage and inflammation in stroke. This study was designed to determine the role of TLR4 in hemorrhagic transformation development after tissue plasminogen activator (tPA) administration. METHODS: Mice expressing (TLR4(+/+)) or lacking functional TLR4 (TLR4(-)(/-)) were subjected to middle cerebral artery occlusion using an in situ thromboembolic model by thrombin injection into the middle cerebral artery, and tPA (10 mg/kg) was administered 20 minutes or 3 hours after ischemia...
April 20, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28427984/effect-of-baseline-characteristics-on-the-outcome-of-stent-retriever-based-thrombectomy-in-acute-basilar-artery-occlusions-a-single-center-experience-and-pooled-data-analysis
#20
Wan-Ling Wen, Zi-Fu Li, Yong-Wei Zhang, Peng-Fei Yang, Keith Simfukwe, Yi-Bin Fang, Tian-Yi Zhang, Ben-Qiang Deng, Bo Hong, Jian-Min Liu, Qing-Hai Huang
OBJECTIVES: -To explore the association of baseline characteristics and the outcome of acute basilar artery occlusion (BAO) patients following stent retriever based thrombectomy (SRT). METHODS: -Clinical and imaging information of consecutive SRT treated BAO patients from a comprehensive stroke center and up-to-date literatures were reviewed respectively. The impact of baseline variables towards favorable outcome was evaluated using subgroup analysis and odds ratio extracted from published data resource together with single center records using pooled analysis...
April 17, 2017: World Neurosurgery
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